A Faster Target for Network Blocks

Zcash's NU7 upgrade reached its mainnet activation milestone at block 3,543,405, according to November 6 reporting by The Block. The Zcash Foundation's supporting Zebra release documentation sets out the main changes, including a reduction in the target interval between blocks from 75 seconds to 25 seconds.

The documentation says block rewards are adjusted to preserve the amount of ZEC issued per day, with corresponding changes to height-based schedules. Faster blocks therefore do not mean the network simply issues three times as many coins. The supply cap and the intended halving cadence remain separate from the block interval.

Fee Handling and Legacy Transactions Also Change

NU7 introduces a mechanism that places part of transaction fees into a reserve for later reissuance through block rewards. The foundation describes 60 percent entering the reserve and 40 percent remaining with miners. This is a change to fee allocation and future security funding, rather than a new reward paid directly to ordinary token holders.

The upgrade also removes validity for version-four transactions, affecting the legacy Sprout pool. The foundation warned in advance that funds left there would become unspendable after activation. That limitation concerns a specific legacy transaction path and should not be generalized into a claim that ordinary balances across the network are frozen.

Confirmation Targets Are Not End-to-End Guarantees

A shorter expected block interval can reduce the time to an initial confirmation. The full experience still depends on transaction preparation, network conditions and the confirmation policy of the receiving service. An exchange may require several confirmations or additional checks, so its crediting time need not equal one target block interval.

Protocol upgrades also require coordinated software support. Nodes, wallets and service providers must follow compatible rules to remain aligned with the active network. The foundation's release notes identify operational changes alongside the user-facing improvements, showing why an upgrade is both a feature milestone and an infrastructure transition.

NU7's main significance is the combination of faster block timing with changes to long-term fee handling and legacy support. Evaluating the outcome requires keeping those components distinct. Faster confirmations describe one benefit, while issuance rules, compatibility and wallet behavior determine how the upgraded network functions in practice.